The RadInputManager offers an easy and intuitive way to extend a standard ASP.NET TextBox, and without any extra custom code, introduce much functionality,
normally related to a Telerik RadInput control.

About RadInputManager for ASP.NET AJAX

Within the RadInputManager, there are four types of settings which could be added:

telerik:TextBoxSetting - the targeted text box will exhibit behavior
like a normal RadTextBox

telerik:NumericTextBoxSetting - the targeted textbox will be accepting numeric input

telerik:DateInputSetting - the targeted text box will be accepting input in a date format

telerik:RegExpTextBoxSetting - the targeted text box will be accepting characters corresponding to a specified regular expression

telerik:MaskedTextBoxSetting - the targeted text box will exhibit behavior like a RadMaskedTextBox

RadInputManager and 90+ other controls are part of UI for ASP.NET AJAX, a comprehensive toolset taking
care of the common functionality of your application, while leaving you with more
time to work on its business logic.

Key Features

Rich client-side and server-side API

Client-side and Server-side data validation

Advanced Skinning - The visual appearance of the Input controls can be easily customized through skins